CN114874549A - Universal meter pincer-type meter shell material and preparation method thereof - Google Patents
Universal meter pincer-type meter shell material and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- 239000011257 shell material Substances 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 85
- 238000002156 mixing Methods 0.000 claims abstract description 72
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 44
- XUMBMVFBXHLACL-UHFFFAOYSA-N Melanin Chemical compound O=C1C(=O)C(C2=CNC3=C(C(C(=O)C4=C32)=O)C)=C2C4=CNC2=C1C XUMBMVFBXHLACL-UHFFFAOYSA-N 0.000 claims abstract description 38
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000003756 stirring Methods 0.000 claims abstract description 29
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical class N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 25
- 239000000654 additive Substances 0.000 claims abstract description 23
- 239000004014 plasticizer Substances 0.000 claims abstract description 23
- 239000004743 Polypropylene Substances 0.000 claims abstract description 19
- 230000000996 additive effect Effects 0.000 claims abstract description 19
- 229920001155 polypropylene Polymers 0.000 claims abstract description 19
- -1 polypropylene Polymers 0.000 claims abstract description 18
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 17
- 229920005989 resin Polymers 0.000 claims abstract description 17
- 229920003048 styrene butadiene rubber Polymers 0.000 claims abstract description 17
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 15
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 15
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000008117 stearic acid Substances 0.000 claims abstract description 15
- 239000011787 zinc oxide Substances 0.000 claims abstract description 15
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 79
- 238000001816 cooling Methods 0.000 claims description 28
- 239000003365 glass fiber Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 13
- IRIAEXORFWYRCZ-UHFFFAOYSA-N Butylbenzyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCC1=CC=CC=C1 IRIAEXORFWYRCZ-UHFFFAOYSA-N 0.000 claims description 12
- ZFOZVQLOBQUTQQ-UHFFFAOYSA-N Tributyl citrate Chemical compound CCCCOC(=O)CC(O)(C(=O)OCCCC)CC(=O)OCCCC ZFOZVQLOBQUTQQ-UHFFFAOYSA-N 0.000 claims description 12
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
- RNLHGQLZWXBQNY-UHFFFAOYSA-N 3-(aminomethyl)-3,5,5-trimethylcyclohexan-1-amine Chemical compound CC1(C)CC(N)CC(C)(CN)C1 RNLHGQLZWXBQNY-UHFFFAOYSA-N 0.000 claims description 6
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims description 6
- 239000006229 carbon black Substances 0.000 claims description 6
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 6
- 239000000347 magnesium hydroxide Substances 0.000 claims description 6
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 6
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims description 6
- 229920001296 polysiloxane Polymers 0.000 claims 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims 1
- 239000003063 flame retardant Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract 1
- 238000004898 kneading Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
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- 238000005260 corrosion Methods 0.000 description 1
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- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
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- 238000004806 packaging method and process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/387—Borates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
The invention discloses a clamp type multimeter shell material and a preparation method thereof, and relates to the technical field of preparation of multimeter shells. The composite material comprises the following raw materials in parts by weight: 10-20 parts of polypropylene, 8-15 parts of additive, 6-8 parts of melanin, 10-20 parts of styrene butadiene rubber, 3-8 parts of fluorocarbon resin, 1-3 parts of plasticizer, 1-5 parts of zinc oxide, 1-2 parts of stearic acid, 2-4 parts of anti-aging agent, 1-2 parts of curing agent, 2-6 parts of modified flame retardant and 1-3 parts of insulating auxiliary agent, and the preparation steps are S1 and preparation of base material; s2, preparing a first mixed material; s3, preparing a mixed modified material; s4, centrifuging, stirring and mixing; s5, extruding by a double-screw extruder; s6, kneading operation. The invention is beneficial to improving the flame retardant property and plasticizing effect of the prepared multimeter shell material, and the prepared multimeter shell has good synergistic effect among raw material components, can achieve higher mechanical property, and has excellent thermal stability and flame retardant property.
Description
Technical Field
The invention relates to the technical field of universal meter shell preparation, in particular to a universal meter pincer-type meter shell material and a preparation method thereof.
Background
Polypropylene (PP) is one of widely applied plastic products, which has the advantages of heat resistance, corrosion resistance, small density, easy processing and the like, and is widely applied to a plurality of fields of automobile industry, household appliances, food packaging, building decoration and the like at present, a universal meter can be used for measuring the resistance of an object to be measured, alternating current and direct current voltages, even some universal meters can be used for measuring main parameters of a transistor, the capacitance and the like of a capacitor and the like, the using method of the universal meter is one of the most basic skills of electronic technology and is fully and skillfully mastered, common universal meters comprise a universal meter and a digital universal meter, the basic principle of the universal meter is that a sensitive magnetoelectric direct current ammeter (microampere meter) is used as a meter head, when a tiny current passes through the meter head, current can be indicated, but the meter head can not pass through the large current, and some resistors are connected in parallel and in series on the meter head for shunting or reducing the voltage, thus measuring the current, voltage and resistance in the circuit.
In order to improve the using effect and performance of a multimeter, a preparation material process of the multimeter needs to be further modified, and in the process of preparing a multimeter clamp type case body material in the prior art, the properties of mechanical strength and thermal stability still need to be further improved and strengthened.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a clamp-type meter shell material of a multimeter and a preparation method thereof, and aims to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a clamp-type multimeter shell material comprises the following raw materials in parts by weight: 10-20 parts of polypropylene, 8-15 parts of additive, 6-8 parts of melanin, 10-20 parts of styrene butadiene rubber, 3-8 parts of fluorocarbon resin, 1-3 parts of plasticizer, 1-5 parts of zinc oxide, 1-2 parts of stearic acid, 2-4 parts of anti-aging agent, 1-2 parts of curing agent, 2-6 parts of modified flame retardant and 1-3 parts of insulating auxiliary agent.
A preparation method of a clamp-type multimeter shell material comprises the following steps:
s1, preparation of base materials: putting polypropylene, styrene-butadiene rubber and fluorocarbon resin into an internal mixer, uniformly mixing, heating to 120-130 ℃, preserving heat for 10-20min, and cooling to room temperature to obtain the required base material;
s2, preparing a mixed material: sequentially adding melanin, additives, plasticizers, zinc oxide, stearic acid and anti-aging agents into the base material obtained in the step S1, uniformly mixing, stirring at the rotating speed of 850-;
s3, preparation of a mixed modified material: adding the modified flame retardant and the insulating assistant into the mixture obtained in the step S2, uniformly mixing, stirring at the rotating speed of 2500-;
s4, centrifugal stirring and mixing: putting the mixed modified material prepared in the step S3 into a centrifuge, centrifuging and stirring for 3-5min at the rotating speed of 1500r/min, and uniformly mixing for later use;
s5, extruding operation of a double-screw extruder: putting the material prepared in the step S4 into a double-screw extruder to be extruded into a molten state, so as to obtain a required mixture;
s6, mixing operation: and (4) adding a curing agent into the mixture prepared in the step S5, placing the mixture into a mixing roll, mixing the mixture for 1 to 1.5 hours at the temperature of 190-200 ℃, taking out the mixture, quickly cooling the mixture, mixing the mixture for the second time after cooling, and then extruding and forming the mixture to obtain the multimeter shell material.
Further optimizing the technical scheme, the materials in the internal mixer in the step S1 are stirred at the rotating speed of 1300-1800r/min for 10-30 min.
Further optimizing the technical scheme, the plasticizer in the step S2 is a mixture of di (2-ethylhexyl) phthalate, tributyl citrate and butyl benzyl phthalate in a mass ratio of 1: 2, and the anti-aging agent is an anti-aging agent RD.
Further optimizing the technical scheme, the rapid cooling speed in the step S3 is to cool at a speed of 22-25 ℃/min.
Further optimizing the technical scheme, the melanin in the step S2 is carbon black N330, the additive is glass fiber, and the diameter of the glass fiber is 2-4 μm and the length of the glass fiber is 2-8 mm.
Further optimizing the technical scheme, the modified flame retardant in the step S3 is a composition of magnesium hydroxide and zinc borate.
Further optimizing the technical scheme, the operation of the secondary mixing in the step S6 is to continue to perform the secondary mixing for 1.5-2h in the mixing mill at the temperature of 200-220 ℃ after the cooled first raw material is crushed.
Further optimizing the technical scheme, the curing agent in the step S6 is a mixture of aluminum oxide, isophorone diamine and diethylenetriamine in a mass ratio of 2: 1.
Compared with the prior art, the invention provides a multimeter clamp type case material and a preparation method thereof, and the multimeter clamp type case material has the following beneficial effects:
1. according to the multimeter pincer-type case material and the preparation method thereof, the polypropylene, the styrene-butadiene rubber and the fluorocarbon resin are used as main base materials, so that the wear resistance and the mechanical strength in the preparation process are improved, and then the polypropylene, the styrene-butadiene rubber and the fluorocarbon resin are mixed with additives, plasticizers, zinc oxide, stearic acid and glass fibers for secondary modification, so that the high-temperature resistance of the raw materials can be effectively improved, and meanwhile, the mechanical property of the product is ensured and the stability of the product is improved through modification.
2. According to the multimeter clamp-type case material and the preparation method thereof, the flame retardant and the plasticizer are added, so that the flame retardant property and the plasticizing effect of the prepared multimeter case material are improved.
Drawings
FIG. 1 is a schematic flow chart of a multimeter case material and a method for manufacturing the same according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows: referring to fig. 1, the invention discloses a case material of a pincer-type multimeter, which comprises the following raw materials in parts by weight: 10-20 parts of polypropylene, 8-15 parts of additive, 6-8 parts of melanin, 10-20 parts of styrene butadiene rubber, 3-8 parts of fluorocarbon resin, 1-3 parts of plasticizer, 1-5 parts of zinc oxide, 1-2 parts of stearic acid, 2-4 parts of anti-aging agent, 1-2 parts of curing agent, 2-6 parts of modified flame retardant and 1-3 parts of insulating auxiliary agent.
A method for preparing a clamp-type multimeter shell material comprises the following steps:
s1, preparation of base materials: putting polypropylene, styrene-butadiene rubber and fluorocarbon resin into an internal mixer, uniformly mixing, heating to 120 ℃, keeping the temperature for 18min, stirring the materials in the internal mixer at the rotating speed of 1800r/min for 20min, and cooling to room temperature to obtain the required base material;
s2, preparing a mixed material: sequentially adding melanin, an additive, a plasticizer, zinc oxide, stearic acid and an anti-aging agent into the base material obtained in the step S1, uniformly mixing, wherein the plasticizer is a mixture of di (2-ethylhexyl) phthalate, tributyl citrate and butyl benzyl phthalate in a mass ratio of 1: 2, the anti-aging agent is an anti-aging agent RD, the melanin is carbon black N330, the additive is glass fiber, the diameter of the glass fiber is 3 micrometers, the length of the glass fiber is 8mm, stirring the mixture at a rotating speed of 900r/min for 2 hours, then continuously heating to 85 ℃, and keeping the temperature for 10 minutes to obtain a required mixed material;
s3, preparation of a mixed modified material: adding a modified flame retardant and an insulating assistant into the mixture obtained in the step S2, wherein the modified flame retardant is a composition of magnesium hydroxide and zinc borate, uniformly mixing, stirring at a rotating speed of 3000/min for 10min, rapidly cooling to room temperature to obtain a required mixed modified material, and cooling at a rapid cooling speed of 25 ℃/min;
s4, centrifugal stirring and mixing: putting the mixed modified material prepared in the step S3 into a centrifuge at the rotating speed of 1500r/min, centrifuging and stirring for 4min, and uniformly mixing for later use;
s5, extruding operation of a double-screw extruder: putting the material prepared in the step S4 into a double-screw extruder to be extruded into a molten state, so as to obtain a required mixture;
s6, mixing operation: and (3) adding a curing agent into the mixture prepared in the step S5, placing the mixture into a mixing roll, mixing the mixture at a high temperature of 200 ℃ for 1.5h, taking out the mixture, quickly cooling the mixture, mixing the mixture for the second time, wherein the operation of mixing the mixture for the second time is to crush the cooled first raw material, continuously mixing the crushed mixture for the second time in the mixing roll at a temperature of 200 ℃ for 2h, and the curing agent is a mixture of aluminum oxide, isophorone diamine and diethylenetriamine with a mass ratio of 2: 1, and then extruding and molding the mixture to obtain the multimeter shell material.
Example two: referring to fig. 1, the invention discloses a case material of a pincer-type multimeter, which comprises the following raw materials in parts by weight: 15 parts of polypropylene, 8 parts of additive, 7 parts of melanin, 15 parts of styrene butadiene rubber, 6 parts of fluorocarbon resin, 2 parts of plasticizer, 3 parts of zinc oxide, 1 part of stearic acid, 3 parts of anti-aging agent, 2 parts of curing agent, 3 parts of modified flame retardant and 2 parts of insulating assistant.
A method for preparing a clamp-type multimeter shell material comprises the following steps:
s1, preparation of base materials: putting polypropylene, styrene-butadiene rubber and fluorocarbon resin into an internal mixer, uniformly mixing, heating to 125 ℃, keeping the temperature for 15min, stirring the materials in the internal mixer at the rotating speed of 1600r/min for 25min, and cooling to room temperature to obtain the required base material;
s2, preparing a mixed material: sequentially adding melanin, an additive, a plasticizer, zinc oxide, stearic acid and an anti-aging agent into the base material obtained in the step S1, uniformly mixing, wherein the plasticizer is a mixture of di (2-ethylhexyl) phthalate, tributyl citrate and butyl benzyl phthalate in a mass ratio of 1: 2, the anti-aging agent is an anti-aging agent RD, the melanin is carbon black N330, the additive is glass fiber, the diameter of the glass fiber is 2-4 mu m, the length of the glass fiber is 2-8mm, stirring at a rotating speed of 1000r/min for 1.5h, then continuously heating to 90 ℃, and keeping the temperature for 10min to obtain a required mixed material;
s3, preparation of a mixed modified material: adding a modified flame retardant and an insulating assistant into the mixture obtained in the step S2, wherein the modified flame retardant is a composition of magnesium hydroxide and zinc borate, uniformly mixing, stirring at a rotating speed of 3000r/min for 10min, rapidly cooling to room temperature to obtain a required mixed modified material, and cooling at a rapid cooling speed of 25 ℃/min;
s4, centrifugal stirring and mixing: putting the mixed modified material prepared in the step S3 into a centrifuge at the rotating speed of 1500r/min, centrifuging and stirring for 4min, and uniformly mixing for later use;
s5, extruding operation of a double-screw extruder: putting the material prepared in the step S4 into a double-screw extruder to be extruded into a molten state, so as to obtain a required mixture;
s6, mixing operation: and (3) adding a curing agent into the mixture prepared in the step S5, placing the mixture into a mixing roll, mixing the mixture at a high temperature of 200 ℃ for 1.5h, taking out the mixture, quickly cooling the mixture, mixing the mixture for the second time, wherein the operation of mixing the mixture for the second time is to crush the cooled first raw material, continuously mixing the crushed mixture for the second time in the mixing roll at a temperature of 220 ℃ for 2h, and the curing agent is a mixture of aluminum oxide, isophorone diamine and diethylenetriamine in a mass ratio of 2: 1, and then extruding and molding the mixture to obtain the multimeter shell material.
Example three: referring to fig. 1, the invention discloses a case material of a pincer-type multimeter, which comprises the following raw materials in parts by weight: 18 parts of polypropylene, 10 parts of additive, 6 parts of melanin, 18 parts of styrene butadiene rubber, 7 parts of fluorocarbon resin, 2 parts of plasticizer, 3 parts of zinc oxide, 1 part of stearic acid, 3 parts of anti-aging agent, 2 parts of curing agent, 4 parts of modified flame retardant and 3 parts of insulating additive.
A method for preparing a clamp-type multimeter shell material comprises the following steps:
s1, preparation of base materials: putting polypropylene, styrene-butadiene rubber and fluorocarbon resin into an internal mixer, uniformly mixing, heating to 130 ℃, keeping the temperature for 18min, stirring the materials in the internal mixer at the rotating speed of 1400r/min for 20min, and cooling to room temperature to obtain the required base material;
s2, preparing a mixed material: sequentially adding melanin, an additive, a plasticizer, zinc oxide, stearic acid and an anti-aging agent into the base material obtained in the step S1, uniformly mixing, wherein the plasticizer is a mixture of di (2-ethylhexyl) phthalate, tributyl citrate and butyl benzyl phthalate in a mass ratio of 1: 2, the anti-aging agent is an anti-aging agent RD, the melanin is carbon black N330, the additive is glass fiber, the diameter of the glass fiber is 2-4 mu m, the length of the glass fiber is 2-8mm, stirring at a rotating speed of 1050r/min for 1-2h, then continuously heating to 90 ℃, and keeping the temperature for 8min to obtain a required mixed material;
s3, preparation of a mixed modified material: adding a modified flame retardant and an insulating assistant into the mixture obtained in the step S2, wherein the modified flame retardant is a composition of magnesium hydroxide and zinc borate, uniformly mixing, stirring at a rotating speed of 3000r/min for 10min, rapidly cooling to room temperature to obtain a required mixed modified material, and cooling at a rapid cooling speed of 24 ℃/min;
s4, centrifugal stirring and mixing: putting the mixed modified material prepared in the step S3 into a centrifuge at the rotating speed of 1500r/min, centrifuging and stirring for 4min, and uniformly mixing for later use;
s5, extruding operation of a double-screw extruder: putting the material prepared in the step S4 into a double-screw extruder to be extruded into a molten state, so as to obtain a required mixture;
s6, mixing operation: and (3) adding a curing agent into the mixture prepared in the step S5, placing the mixture into a mixing roll, mixing the mixture at a high temperature of 190 ℃ for 1.2h, taking out the mixture, quickly cooling the mixture, mixing the mixture for the second time, wherein the operation of mixing the mixture for the second time is to crush the cooled first raw material, continuously mixing the crushed mixture for the second time in the mixing roll at a temperature of 200 ℃ for 1.5h, and the curing agent is a mixture of aluminum oxide, isophorone diamine and diethylenetriamine in a mass ratio of 2: 1, and then extruding and molding the mixture to obtain the multimeter shell material.
Example four: referring to fig. 1, the invention discloses a case material of a pincer-type multimeter, which comprises the following raw materials in parts by weight: 18 parts of polypropylene, 10 parts of additive, 7 parts of melanin, 15 parts of styrene butadiene rubber, 6 parts of fluorocarbon resin, 3 parts of plasticizer, 3 parts of zinc oxide, 2 parts of stearic acid, 4 parts of anti-aging agent, 2 parts of curing agent, 4 parts of modified flame retardant and 3 parts of insulating assistant.
A method for preparing a clamp-type multimeter shell material comprises the following steps:
s1, preparation of base materials: putting polypropylene, styrene-butadiene rubber and fluorocarbon resin into an internal mixer, uniformly mixing, heating to 130 ℃, keeping the temperature for 15min, stirring the materials in the internal mixer at the rotating speed of 1700r/min for 20min, and cooling to room temperature to obtain the required base material;
s2, preparing a mixed material: sequentially adding melanin, an additive, a plasticizer, zinc oxide, stearic acid and an anti-aging agent into the base material obtained in the step S1, uniformly mixing, wherein the plasticizer is a mixture of di (2-ethylhexyl) phthalate, tributyl citrate and butyl benzyl phthalate in a mass ratio of 1: 2, the anti-aging agent is an anti-aging agent RD, the melanin is carbon black N330, the additive is glass fiber, the diameter of the glass fiber is 2-4 mu m, the length of the glass fiber is 2-8mm, stirring at a rotating speed of 900r/min for 1-2h, then continuously heating to 90 ℃, and keeping the temperature for 8min to obtain a required mixed material;
s3, preparation of a mixed modified material: adding a modified flame retardant and an insulating assistant into the mixture obtained in the step S2, wherein the modified flame retardant is a composition of magnesium hydroxide and zinc borate, uniformly mixing, stirring at 3200r/min for 10min, rapidly cooling to room temperature to obtain a required mixed modified material, and cooling at a rapid cooling speed of 25 ℃/min;
s4, centrifugal stirring and mixing: putting the mixed modified material prepared in the step S3 into a centrifuge at the rotating speed of 1500r/min, centrifuging and stirring for 4min, and uniformly mixing for later use;
s5, extruding operation of a double-screw extruder: putting the material prepared in the step S4 into a double-screw extruder to be extruded into a molten state, so as to obtain a required mixture;
s6, mixing operation: and (3) adding a curing agent into the mixture prepared in the step S5, placing the mixture into a mixing roll, mixing the mixture at a high temperature of 200 ℃ for 1.2h, taking out the mixture, quickly cooling, and then mixing the mixture for the second time, wherein the operation of mixing the mixture for the second time is to crush the cooled first raw material, then continuing mixing the crushed mixture for the second time in the mixing roll at a temperature of 200 ℃ and 220 ℃ for 2h, and the curing agent is a mixture of aluminum oxide, isophorone diamine and diethylenetriamine with a mass ratio of 2: 1, and then extruding and molding the mixture to obtain the multimeter case material.
Performance test: the performance test of the prepared electricity meter shell material comprises the following steps:
the multimeter case materials prepared according to examples one, two, three and four of the present invention were tested for performance, wherein the flexural strength was tested according to ASTM D790; tensile strength was tested according to ASTM D638; notched bar impact strength was tested according to ASTM D256; heat distortion temperature was measured according to ASTM D648; the results of the testing of the resulting material are shown in table 1:
| performance parameter | Example one | Example two | EXAMPLE III | Example four |
| Bending strength (Kgf/c square meter) at normal temperature | 1380 | 1390 | 1386 | 1385 |
| Tensile strength (Kgf/c square meter) at normal temperature | 890 | 905 | 900 | 895 |
| Notched impact strength (KJ/square meter) | 13.2 | 13.0 | 13.1 | 13.2 |
| Heat distortion temperature DEG C | 135 | 140 | 135 | 137 |
And (4) judging the standard: through comparison of the three embodiments, the best effect is the second embodiment, so that the second embodiment is selected as the best embodiment, and the specific change of the amount also belongs to the protection scope of the technical scheme.
The invention has the beneficial effects that: according to the multimeter pincer-type case material and the preparation method thereof, the polypropylene, the styrene-butadiene rubber and the fluorocarbon resin are used as main base materials, so that the wear resistance and the mechanical strength in the preparation process are improved, and then the polypropylene, the styrene-butadiene rubber and the fluorocarbon resin are mixed with additives, plasticizers, zinc oxide, stearic acid and glass fibers for secondary modification, so that the high-temperature resistance of the raw materials can be effectively improved, and meanwhile, the mechanical property of the product is ensured and the stability of the product is improved through modification; the addition of the flame retardant and the plasticizer is beneficial to improving the flame retardant property and the plasticizing effect of the prepared multimeter shell material, and the prepared multimeter shell has good synergistic effect among the raw material components, can achieve high mechanical property, has excellent thermal stability and flame retardant property, prolongs the service life of the multimeter, increases the safe use index, and better exerts the service performance.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides a universal meter pincer-type meter casing material which characterized in that, includes the raw materials of following parts by weight: 10-20 parts of polypropylene, 8-15 parts of additive, 6-8 parts of melanin, 10-20 parts of styrene butadiene rubber, 3-8 parts of fluorocarbon resin, 1-3 parts of plasticizer, 1-5 parts of zinc oxide, 1-2 parts of stearic acid, 2-4 parts of anti-aging agent, 1-2 parts of curing agent, 2-6 parts of modified flame retardant and 1-3 parts of insulating auxiliary agent.
2. The method for preparing the material of the clamp-type multimeter case according to claim 1, comprising the steps of:
s1, preparation of base materials: putting polypropylene, styrene-butadiene rubber and fluorocarbon resin into an internal mixer, uniformly mixing, heating to 120-130 ℃, preserving heat for 10-20min, and cooling to room temperature to obtain the required base material;
s2, preparing a mixed material: sequentially adding melanin, additives, plasticizers, zinc oxide, stearic acid and anti-aging agents into the base material obtained in the step S1, uniformly mixing, stirring at the rotating speed of 850-;
s3, preparation of a mixed modified material: adding the modified flame retardant and the insulating assistant into the mixture obtained in the step S2, uniformly mixing, stirring at the rotating speed of 2500-;
s4, centrifugal stirring and mixing: putting the mixed modified material prepared in the step S3 into a centrifuge at the rotating speed of 1500r/min, centrifugally stirring for 3-5min, and uniformly mixing for later use;
s5, extruding operation of a double-screw extruder: putting the material prepared in the step S4 into a double-screw extruder to be extruded into a molten state, so as to obtain a required mixture;
s6, mixing operation: and (4) adding a curing agent into the mixture prepared in the step S5, placing the mixture into a mixing roll, mixing the mixture for 1 to 1.5 hours at the temperature of 190-200 ℃, taking out the mixture, quickly cooling the mixture, mixing the mixture for the second time after cooling, and then extruding and forming the mixture to obtain the multimeter shell material.
3. The method as claimed in claim 2, wherein the materials of the internal mixer in step S1 are stirred at 1300-1800r/min for 10-30 min.
4. The method for preparing a multimeter case material according to claim 2, wherein the plasticizer in step S2 is a mixture of di (2-ethylhexyl) phthalate, tributyl citrate and butyl benzyl phthalate at a mass ratio of 1: 2, and the anti-aging agent is anti-aging agent RD.
5. The method for preparing a material for a case of a multimeter clamp according to claim 2, wherein the rapid cooling in step S3 is performed at a rate of 22-25 ℃/min.
6. The material of claim 2, wherein the melanin in step S2 is carbon black N330, the additive is glass fiber, and the glass fiber has a diameter of 2-4 μm and a length of 2-8 mm.
7. The material for the case of a multimeter clamp of claim 1 wherein the modified flame retardant of step S3 is a combination of magnesium hydroxide and zinc borate, and the insulating additive of step S3 is a silicone sulfonate.
8. The multimeter clamp type case material and the method for preparing the same as claimed in claim 1, wherein the secondary mixing operation in step S6 is to crush the cooled first raw material and then continue to perform secondary mixing in a mixer at a temperature of 200 ℃ and 220 ℃ for 1.5-2 h.
9. The multimeter clamp-on case material and the preparation method thereof according to claim 1, wherein the curing agent in the step S6 is a mixture of aluminum oxide, isophorone diamine and diethylenetriamine in a mass ratio of 2: 1.
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| CN101469118A (en) * | 2007-12-25 | 2009-07-01 | 上海普利特复合材料股份有限公司 | Polymer material for ammeter case |
| CN105504497A (en) * | 2015-12-31 | 2016-04-20 | 惠州市昌亿科技股份有限公司 | Heat-resistant and ageing-resistant long glass fiber reinforced PP (Polypropylene) material and preparation method as well as application thereof |
| CN110982193A (en) * | 2019-12-12 | 2020-04-10 | 浙江晨泰科技股份有限公司 | High-performance electric power meter shell material and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101469118A (en) * | 2007-12-25 | 2009-07-01 | 上海普利特复合材料股份有限公司 | Polymer material for ammeter case |
| CN105504497A (en) * | 2015-12-31 | 2016-04-20 | 惠州市昌亿科技股份有限公司 | Heat-resistant and ageing-resistant long glass fiber reinforced PP (Polypropylene) material and preparation method as well as application thereof |
| CN110982193A (en) * | 2019-12-12 | 2020-04-10 | 浙江晨泰科技股份有限公司 | High-performance electric power meter shell material and preparation method thereof |
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